Is Active Transport Low To High Repack Jun 2026

Deep inside a bustling cell, there was a specialized worker named . Pumper lived in the cell membrane, which was like a busy border wall separating the "Inside City" from the "Outside World".

| Feature | Active Transport | Passive Transport | |---------|----------------|-------------------| | Direction | (against gradient) | High → Low (down gradient) | | Energy needed | Yes (ATP, light, or redox energy) | No | | Examples | Sodium-potassium pump, calcium pump | Diffusion, osmosis, facilitated diffusion | is active transport low to high

One day, the Inside City was running low on (mineral ions). There were only a few left in the Outside World, while the Inside City already had quite a lot packed into its storage rooms. Naturally, minerals would want to drift away from the crowd toward the empty Outside World—a process called diffusion. But the cell needed more minerals to stay strong. Deep inside a bustling cell, there was a

If you see "low to high" in a biology question, the answer is . There were only a few left in the

This is often called moving "against the concentration gradient".